Collapsible core



April 17, 1928. P, DE MATTA.

COLLAPSIBLE COPE Filed Oct. 16, 1924 2 Sheets-Sheet 1 A TTORNEYS P. DE MATTIA COLLAPSIBLE CORE Filed Oct. 16, 1924 April 17, 1.928.

2 Sheets-Sheet 2 -1 6w W l IN VEN TOR Pele! We Mall 7 WITNESSES A TTORNEYS Patented Apr. 17, 1928.

UNITED STATES PATENT OFFICE.

PETER DE MATTIA, or rAssArq N w JERSEY, ASSIGNOR o DE MATTIA BROTHERS, me, or GARFIELD, NEW'JERSEY, A CORPORATION or NEW JERSEY.

COLL APSIIBLE CORE;

Application filed October 16, 1924'. Serial No. 744,045.

The present invention relates tocollapsible cores employed in the manufacture ofshoes or casings for pneumatic tires, and it has for its object to greatly simplify. the means by which the core is operated'in collapsing and expanding it and toso mount. and move the key section. as toprovidethat it may be quickly withdrawnfrom the position of. op

erat-ive continuity .or from the tire and re-;

turned to thatpositiomand also thatcthe key section shall. have such. .movementsin col.-

lapsing the core as toprovide for: a maximum clearance of other movable sections in collapslng the core.;

To the above ends the presentinvention consists of the collapsible. coreiiand. the dewith the. sections thereof ,in annularform' or in the plane of and position of. operative.

continuity, as it has becomezknown-in' this 5 art. V g 2 is a horizontal section taken on.

the line 22 of Fig. 1 looking downward. Fig. 3v is a vertical. section taken on the line 3-3 of Fig. 1.

Fig.4 is a view similar to Fig. 3 and show- 'ing in full and. dotted lines the movements ofthekeysection. a Fig. 5 is:'a view similar to Fig. 2'taken onthe line-55 of' Fig. 1 looking downward.

Similar reference characters will beemployed throughout the specification I and drawing to designate corresponding. parts.

Thecore proper comprises a plurality of segmental sections, there being four such sections in the form shown in the drawings,

of which the section K is the key section, and:

thetsections S and S are pivoted sections, section F being the fixed section. As shown in Fig. I the-fixed section F is bolted at 5 toan ear 6' forming'part of the chuck or support, and as shown'in Figs. 1 and 2 the fixed section F isal'so bolted at 7 to the outer obliquely inclined table 8 of a as shown :in Fig. 1 in a manner which will be clearly understood by those familiar with fitted to have a sliding movement in anopen channel guide formed, by parallel flanges 16, pro] ect1ng,fr0n1 1 the upper surface of the casting 10 (see'Figs. 1 and 2) andiin which the, shank 15, is arranged to have a free slid-- mg movement radially and also to be moved,

into and outvof said guide. in a direction.

15 also has a telescopic sliding connection- I transverse to theplaneofthe core, as will: be hereinafter fully described. The'shank.

with a guidelf which is pivotally mounted V at it's-lower end '18 on a shaft 20 disposedv at right angles to 'the path of movement of the shank 15 mounted in hangers-21 andf22 carried by the chuck 10.

By the-arrangement just 'describedthe key section K by reason'of its sliding movement in the guides 16 and 17 may be moved in: the plane of the core or, as it is known, the plane of operative continuity, for the purpose of moving itradially into andout of the position of operative continuity, and after it has been withdrawn from the tire in the plane ofithe' core thev swinging of the guide17 about the shaft 20 permits the keysection K" to be i moved in a circular path out: of that plane andin a direction at right angles to. that plane. Because of-the location of, the pivot -or shaft 20 at, apoint adjacent the fixed sec tion F, and upontheopposite side of a line cutting the diameter'of the core ('asfor' instance the line 5-5 in.Fi-g..1) tothat occu' pied'bythe key section K, when the guide 17' with/the section K, shall have been moved out of the plane of the core to the maximumeggtent (as indicated in dotted lines in Fig; 4):that section will be positioned out of the plane of the core and out of the. path ofmovement of the pivoted sections.

In theconstr'uction shown in the drawing a simple toggle mechanism has been provided whereby the movement of the shank 15 of the keyse'ction K with relation to the guides 16 and 17 and with the guide 17' about the shaft 20 is efl'ected in such time relationtha't the radial movements of the key sectioninto and out of the-positionof operative continuity and the swinging motion thereof with relationto thefplan'e of Operative continuity are produced in operative sequence and preferably by the manipulation of a single mechanical element by the op- This arrangement is such that with the parts in the position shown in Fig. 1 the operating mechanism is wholly within theplane oi the core and a movement of the lever 23 about its pivot 24 will, through the link 25 impart a radial inward sliding movement to the shank in the guides16 and 17, thus imparting to the key section K an inward collapsing movement in the plane of the core to withdraw that section from the tire and the position of operative continuity, and this radial movement in the plane of the core will continue until the movement of the lever 23 and thelink 25 approximate the position shown in full lines in Fig. 4;, after which the continued movement of the lever 23 will,

through the link 25, rock the guide 1? about the shaft 20, thus imparting a swinging movement to the section K out of the plane of operative continuity in a direction at right angles to that plane, the movement of the shank 15 and section K out of the plane of the core being permitted by reason of the open guides 16. This swinging movement places'the parts in the dotted line position (as indicated in Fig. 4;). A movement of the lever 23 in the opposite direction results first in bringing the parts into the plane of the core and thereafter moving the key section radially, tofthe position of 'operative continuity (as shown in Fig. 1).

When the parts arein the position shown in Fig. 1, andas shown in Fig. 3"tlie pivot 27 is slightly beyond the dead center and in this position also a locking block 28, carried by the shank 15, by its upper beveled edge engages the corresponding beveled edge 29, carried by the chuck 10, the engagement of these beveled portions locking andpreventing accidental displacement of the parts until movement shall be imparted thereto by means of the lever 23, thus insuring that the key section K will be held in the position of operative continuity and in the plane of operative continuity until it is desired to move, it through the instrumentality of the lever 28' and the other mechanism just described. It will be observed that by the manual operation of a single instrumentality, that is to say the lever 23, the key sect-ion of the core may be first withdrawn radially from the tire in the plane of the core, then swung outward from the plane of the core and maybe restored to the position of operative continuity by, the reverse movement or" the lever 23 which first returns 'thekey section K to the plane of operative continuity and thereafter moves it radially to the position of operative continuity.

' The pivoted section to is pivotally mounted upon an inclined pivot 30 whereby that section in its movements will not only move in and out with relation to the center of the core. but also in an inclined or oblique path about the pivot .30sothat it moves with relation to the plane of operative continuity and out of and into thatplane. The movable section S is pivotally connected at. 31

to a swivel, the shank 32 of which is arranged to freely turn in a bearing carried by the chuck 10. This arrangement is such that the section S maybe withdrawn from.

the the by swinging it about the pivot 31 and at the same time by the turning of the shank 32 of the swivel in its bearing the s'ec-' tion S may be moved intoand out of the plane of operative continuity.

' The method of mounting and moving the sections S and S is Well known in this art and need not be further described. In operation, and assuming the parts who in the position shown in Fig. 1 with a tire thereon the operator by grasping and pulling the lever- 23.towards him withdraws the key section Kradially and by a continuous tire may be readily removed from the fixed section .F.

Having described invention, claim'z 1. A collapsible core comprising a plurality of core sections, a chuck or'support therefor, one of said sections having a radial sliding movement on said chuckin the plane of the core, and also a swinging movement into and out of said plane, a swinging lever pivotally mounted at-its lower end and a link pivotally connecting said lever and said movable section, the said lever being movable from a position within the plane of the core to a position outside of said plane and transversely thereto, to lmpart to said movable section 1n succession radial movements intov and out of a position of operative continuity and swinging movements into and out of the plane of operative continuity. 2. A collapsible core comprising a plurality of core sections a chuck or support therefor, one of said sections having a sliding connection as well as a swinging connection with said chuck and means comprising a pivoted lever and a connecting link pivotally connected to said lever and said movable member, said lever and link movable into and out of the plane of the core and transversely thereto whereby to impart to saidv movable member in succession and in time relation radial movements in the plane of the core and swinging movements transversely thereto. 7 r p 3. In a collapsible core comprising a plurality of movable sections, one of said sections being radially movable in the plane of ment into and out of the plane ofthe core,

the core and also having a swinging movei a sliding shankcarried by said section, s'uitengaging locking members, one of which iscarried by and movable with said sliding shank and the other of which is relatively fixed and arranged to be engaged by the movement ofsaid shank to position the radially movable section in the position of'operative continuity.

PETER DE MATTIA. 

